/Engine/Source/Editor/ComponentVisualizers/Public/SplineComponentVisualizer.h
Snapping: generic method for snapping selected keys to given transform
virtual void SnapKeyToTransform ( const ESplineComponentSnapMode InSnapMode, const FVector & InWorldPos, const FVector & InWorldUpVector, const FVector & InWorldForwardVector, const FVector & InScale, const [USplineMetadata](API\Runtime\Engine\Components\USplineMetadata) * InCopySplineMetadata, const int32 InCopySplineMetadataKey )